29 C.F.R. § 4041A.21
General rule.
eCFR amendment effective 2019-07-01 · current text · last amended by 84 FR 18722, May 2, 2019
The plan sponsor of a multiemployer plan that terminates by mass withdrawal must continue to administer the plan in accordance with applicable statutory provisions, regulations, and plan provisions until a trustee is appointed under section 4042 of ERISA or until plan assets are distributed in accordance with subpart D of this part. In addition, the plan sponsor is responsible for the specific duties described in this subpart.